<PAGE>
                                                                               .
                                                                               .
                                                                               .

                                                                      EXHIBIT 21
                               EL PASO CGP COMPANY
                                 OWNERSHIP LIST
                             AS OF SEPTEMBER 9, 2004

<TABLE>
<CAPTION>
                                                                                                                         %
                      ENTITY NAME                                                  OWNER                             OWNERSHIP
------------------------------------------------------------------------------------------------------------------------------
<S>                                                              <C>                                                 <C>
ANR Independence Pipeline Company (DE)                           American Natural Resources Company                      100
ANR Venture Eagle Point Company (DE)                             American Natural Resources Company                      100
ANR Venture Management Company (DE)                              American Natural Resources Company                      100
El Paso ANR Investments, L.L.C. (DE)                             American Natural Resources Company                      100
Mid Michigan Gas Storage Company (MI)                            American Natural Resources Company                      100
Empresa de Generacion Electrica Fortuna, S.A. (Panama)           Americas Generation Corp.                                49
                                                                 Unaffiliated Parties                                     51
Americas Generation Corp. (Panama)                               Americas Holding Corp.                                  100
Transport USA, Inc. (PA)                                         ANR Advance Holdings, Inc.                              100
Blue Lake Gas Storage Company (MI)                               ANR Blue Lake Company                                    75
                                                                 Unaffiliated Parties                                     25
ANR Real Estate Corporation (DE)                                 ANR Development Corporation                             100
Harbortown Commercial Partnership (MI)                           ANR Development Corporation                           66.66
                                                                 Unaffiliated Parties                                  33.33
Harbortown Condominium Partnership (MI)                          ANR Development Corporation                           66.66
                                                                 Unaffiliated Parties                                  33.33
Harbortown Development Partnership (MI)                          ANR Development Corporation                           66.66
                                                                 Unaffiliated Parties                                  33.33
Harbortown Limited Dividend Housing Association (MI)             ANR Development Corporation                              50
                                                                 Unaffiliated Parties                                     50
Eaton Rapids Gas Storage System (Joint Venture) (MI)             ANR Eaton Company                                        50
                                                                 Unaffiliated Parties                                     50
Independence Pipeline Company (DE)                               ANR Independence Pipeline Company                        50
                                                                 Unaffiliated Parties                                     50
Jackson Pipeline Company (General Partnership) (MI)              ANR Jackson Company                                      25
                                                                 Unaffiliated Parties                                     75
ANR Alliance Pipeline Company Canada, Inc.                       ANR Pipeline Company                                    100
(New Brunswick)
ANR Capital Corporation (DE)                                     ANR Pipeline Company                                    100
El Paso Great Lakes, Inc. (DE)                                   ANR Pipeline Company                                    100
ANR Blue Lake Company (DE)                                       ANR Storage Company                                     100
ANR Eaton Company (MI)                                           ANR Storage Company                                     100
ANR Jackson Company (DE)                                         ANR Storage Company                                     100
ANR Northeastern Gas Storage Company (DE)                        ANR Storage Company                                     100
ANR Western Storage Company (DE)                                 ANR Storage Company                                     100
Kalkaska Gas Storage Limited Partnership (MI)                    ANR Storage Company                                      75
                                                                 Unaffiliated Parties                                     25
Cold Springs Gas Storage Limited Partnership (MI)                ANR Storage Company                          (GP)    33.335
                                                                 Kalkaska Gas Storage Limited Partnership     (GP)    33.335
                                                                 Unaffiliated Parties                         (LP)     33.33
Capitol District Energy Center Cogeneration Associates (Joint    ANR Venture Management Company                           50
Venture) (CT)                                                    Mesquite Investors, L.L.C.                               50
ANRV Eagle Point, L.P. (DE)                                      ANRV-EP, Inc.                                (GP)         1
                                                                 Coastal Eagle Point Oil Company              (LP)        99
</TABLE>

<PAGE>

<TABLE>
<CAPTION>
                                                                                                                              %
                    ENTITY NAME                                                          OWNER                            OWNERSHIP
-----------------------------------------------------------------------------------------------------------------------------------
<S>                                                              <C>                                                      <C>
CDECCA Property Company, L.L.C. (DE)                             Capitol District Energy Center Cogeneration Associates        100
                                                                 (Joint Venture)
Cheyenne Plains Gas Pipeline Company, L.L.C. (DE)                Cheyenne Plains Investment Company, L.L.C.                    100
Young Gas Storage Company, Ltd. (CO)                             CIG Gas Storage Company                                      47.5
                                                                 Unaffiliated Parties                                         52.5
Wyco Development LLC                                             CIG Gas Supply Company                                         50
                                                                 Unaffiliated Parties                                           50
Cliffside Helium LLC                                             CIG Resources Company                                           4
                                                                 Unaffiliated Parties                                           96
Fort Union Gas Gathering, L.L.C. (DE)                            CIG Resources Company                                       10.01
                                                                 Unaffiliated Parties                                        89.99
Canyon Creek Compression Company                                 CIG-Canyon Compression Company                                 15
(General Partnership) (IL)                                       Unaffiliated Parties                                           85
CIGE Company (DE)                                                CIGE Holdco, Inc.                                             100
Coastal Cayman Finance Ltd. (Cayman Islands)                     Coastal (Bermuda) Petroleum Limited                           100
Coastal Oil & Gas Australia 20 Pty Ltd. (Australia)              Coastal Australia AC 96-3 Ltd.                                100
Coastal Oil & Gas Australia 21 Pty Ltd. (Australia)              Coastal Australia AC 96-4 Ltd.                                100
Coastal Petrochemical, L.P. (Quebec)                             Coastal Canada Petroleum, Inc.              (LP)           50.999
                                                                 Coastal Petrochemical, Inc.                 (GP              .002
                                                                 Unaffiliated Parties                        (LP)           48.999
Coastal Austral Ltd. (Cayman Islands)                            Coastal Cape Horn Ltd.                                        100
Coastal TDF Ltd. (Cayman Islands)                                Coastal Cape Horn Ltd.                                        100
McCoy Caney Coal Company (DE)                                    Coastal Coal, Inc.                                            100
Coastal Oil & Gas Australia Pty Ltd (Australia)                  Coastal Development II Ltd.                                   100
Coastal Oil & Gas Australia 283 Pty Ltd. (Australia)             Coastal Development III Ltd.                                  100
Coastal Wartsila Petroleum Private Limited (India)               Coastal Energy Resources Ltd.                                  50
                                                                 Unaffiliated Parties                                           50
Coastal Services Petroleum (U.K.) Limited (England)              Coastal Europe Limited                                        100
Coastal States Petroleum (U.K.) Limited (England)                Coastal Europe Limited                                      99.99
                                                                 Coastal States Tankers (U.K.) Limited                         .01
Coastal States Tankers (U.K.) Limited (England)                  Coastal Europe Limited                                       99.5
                                                                 Coastal States Petroleum (U.K.) Limited)                       .5
Colbourne Insurance Company Limited (England)                    Coastal Europe Limited                                         77
                                                                 El Paso Energy Capital Company                                 23
Coastal Gas India Ltd. (Maritius)                                Coastal Gas India Holdings Ltd.                               100
Coastal Gas Australia Pty Ltd. (Australia)                       Coastal Gas International Ltd.                                100
Coastal Gas Storage Victoria Pty Ltd. (Australia)                Coastal Gas Storage Victoria Ltd.                             100
Suzhou Suda Cogeneration Power Company Ltd. (China)              Coastal Gusu Heat & Power, Ltd.                                60
                                                                 Unaffiliated Parties                                           40
Coastal Gas de Mexico S de R.L. de C.V. (Mexico)                 Coastal Halcon Pipeline I Ltd.                                 50
                                                                 Coastal Halcon Pipeline II Ltd.                                50
Ducto del Bajio, S. de R.L. de C.V. (Mexico)                     Coastal Halcon Pipeline I Ltd.                                 50
                                                                 Coastal Halcon Pipeline II Ltd.                                50
Coastal Henan I Power Ltd. (Cayman Islands)                      Coastal Henan Power Ltd.                                      100
Coastal Henan II Power Ltd. (Cayman Islands)                     Coastal Henan Power Ltd.                                      100
Coastal Energy Resources Ltd. (Mauritius)                        Coastal India Petroleum Ltd.                                  100
Coastal Offshore Finance Ltd. (Cayman Islands)                   Coastal International Finance Ltd.                            100
</TABLE>

                                     Page 2
<PAGE>

<TABLE>
<CAPTION>
                                                                                                                            %
                        ENTITY NAME                                                    OWNER                            OWNERSHIP
---------------------------------------------------------------------------------------------------------------------------------
<S>                                                              <C>                                                    <C>
Empresa Generadora de Electricidad Itabo, S.A.                   Coastal Itabo Ltd.                                          50*
(Dominican Republic)                                             Unaffiliated Parties                                        50
New Caribbean Investment, S.A. (Dominican Republic)              Coastal Itabo, Ltd.                                      49.97
                                                                 Coastal Power Dominicana Generation                        .01
                                                                 Coastal Technology Dominicana S.A.                         .01
                                                                 Unaffiliated Parties                                     50.01
Coastal Nanjing Manager Ltd. (Cayman Islands)                    Coastal Nanjing Investor Ltd.                              100
Coastal Nanjing Power Ltd. (Cayman Islands)                      Coastal Nanjing Investor Ltd.                               99
                                                                 Coastal Nanjing Manager Ltd.                                 1
Nanjing Coastal Xingang Cogeneration Power Plant (China)         Coastal Nanjing Power Ltd.                                  80
                                                                 Unaffiliated Parties                                        20
Nejapa Power Company, L.L.C. (DE)                                Coastal Nejapa Ltd.                                         .5
                                                                 Coastal Salvadoran Power Ltd.                               .5
                                                                 Unaffiliated Parties                                        99
Coastal Offshore Insurance Ltd. (Bermuda)                        Coastal Offshore Finance Ltd.                              100
Coastal Palembang Power (Singapore) Pte Ltd. (Singapore)         Coastal Palembang Power Ltd.                               100
Coastal Peenya Power Ltd. (Mauritius)                            Coastal Peenya Investor Ltd.                                99
                                                                 Coastal Peenya Manager Ltd.                                  1
Peenya Power Company (India)                                     Coastal Peenya Power Ltd.                                   50
                                                                 Unaffiliated Parties                                        50
Coastal Petrochemical International (L) Limited (Labuan)         Coastal Petrochemical International A.V.V.                 100
Coastal Fuji Oil Ltd. (Cayman Islands)                           Coastal Petroleum N.V.                                      50
                                                                 Unaffiliated Parties                                        50
Coastal Petroleum N.V. Chile Limitada                            Coastal Petroleum N.V.                                    99.9
(Chilean Limited Partnership)                                    Coastal India Petroleum Ltd.                                .1
United Summit Coastal Oil Ltd. (Bangladesh)                      Coastal Petroleum N.V.                                      50
                                                                 Unaffiliated Parties                                        50
Coastal Chile Agencia De Naves Limitada                          Coastal Petroleum N.V. Chile Limitada                    99.99
(Chilean Limited Partnership)                                    Coastal Aruba Investor N.V.                                .01
Coastal Chile Comercial Limitada                                 Coastal Petroleum N.V. Chile Limitada                    99.99
(Chilean Limited Partnership)                                    Coastal Aruba Investor N.V.                                .01
Coastal Itabo, Ltd. (Cayman Islands)                             Coastal Power Dominicana Generation Ltd.                   100
Triangle Finance Company, LLC (DE)                               Coastal Power Guatemala Ltd.                                46
                                                                 Unaffiliated Parties                                        54
Coastal Power India I Ltd. (Mauritius)                           Coastal Power India (Cayman) Ltd.                          100
Quetta Power Holding Company I Ltd.                              Coastal Power International II Ltd.                         50
(Cayman Islands)                                                 Unaffiliated Parties                                        50
Arena Power, Ltd. (Cayman Islands)                               Coastal Power International IV Ltd.                        100
ELUSA Power II Investment, Ltd. (Cayman Islands)                 Coastal Power International IV Ltd.                        100
ELUSA Power Investments, Ltd. (Cayman Islands)                   Coastal Power International IV Ltd.                        100
Plata Power, Ltd. (Cayman Islands)                               Coastal Power International IV Ltd.                        100
Santiago Power, Ltd. (Cayman Islands)                            Coastal Power International IV Ltd.                        100
Generadora Electrica Occidental S.A. (Nicaragua)                 Coastal Power International IV, Ltd.                        26
                                                                 Unaffiliated Parties                                        74
Compania de Electricidad de Puerto Plata, S.A.                   Coastal Power International Ltd.                         47.79
(Dominican Republic)                                             Coastal Technology Dominicana, S.A.                        .01
                                                                 Coastal Salvadoran Power Ltd.                              .01
                                                                 Coastal Wuxi Investor Ltd.                                 .01
                                                                 Coastal Wuxi Manager Ltd.                                  .01
                                                                 Unaffiliated Parties                                     52.17
</TABLE>

                                     Page 3
<PAGE>

<TABLE>
<CAPTION>
                                                                                                                           %
                         ENTITY NAME                                                 OWNER                             OWNERSHIP
--------------------------------------------------------------------------------------------------------------------------------
<S>                                                              <C>                                                   <C>
Energia Coastal Guatemala S.A. (Guatemala)                       Coastal Power International Ltd.                           100
CEG Finance Company Ltd. (Cayman Islands)                        Coastal Power Nicaragua Holding Company Ltd.           90.9091
                                                                 Coastal Power Nicaragua Ltd.                            9.0909
Coastal Power Nicaragua Holding Company Ltd. (Cayman Islands)    Coastal Power Nicaragua Ltd.                               100
Tipitapa Power Company Ltd. (Cayman Islands)                     Coastal Power Nicaragua Ltd.                                59
                                                                 Coastal Power Nicaragua Holding Company Ltd.                 1
                                                                 Unaffiliated Parties                                        40
Coastal Power Panama Investor, S.A. (Panama)                     Coastal Power Panama Generation Ltd.                       100
Pedregal Power Company S. de R.L. (Panama)                       Coastal Power Panama Generation Ltd.                     21.22
                                                                 Unaffiliated Parties                                     78.78
Americas Holding Corp. (Panama)                                  Coastal Power Panama Investor, S.A.                       49.9
                                                                 Unaffiliated Parties                                      50.1
Coastal Saba Power Ltd. (Mauritius)                              Coastal Saba Investor II Ltd.                               99
                                                                 Coastal Saba Manager II Ltd.                                 1
Coastal Saba Investor II Ltd. (Cayman Islands)                   Coastal Saba Investor Ltd.                                  99
                                                                 Coastal Saba Manager Ltd.                                    1
Coastal Saba Manager II Ltd. (Cayman Islands)                    Coastal Saba Investor Ltd.                                  99
                                                                 Coastal Saba Manager Ltd.                                    1
Saba Power Company (Private) Limited (Pakistan)                  Coastal Saba Power Ltd.                                 92.154*
                                                                 Unaffiliated Parties                                     7.846
Coastal Nejapa Ltd. (Cayman Islands)                             Coastal Salvadoran Power Ltd.                               87
                                                                 Unaffiliated Parties                                        13
Andros Ltd. (Cayman Islands)                                     Coastal Securities Company Limited                         100
Coastal (Bermuda) Petroleum Limited (Bermuda)                    Coastal Securities Company Limited                         100
Coastal Belcher Petroleum Pte Ltd. (Singapore)                   Coastal Securities Company Limited                       .2797
                                                                 Coastal Cayman Finance Ltd.                            99.7203
Coastal Management Services (Singapore) Pte Ltd. (Singapore)     Coastal Securities Company Limited                         100
Coastal Petroleum (Far East) Pte Ltd. (Singapore)                Coastal Securities Company Limited                         100
Holborn Oil Trading Limited (Bermuda)                            Coastal Securities Company Limited                         100
Coastal (Cayman Islands) Construction Company Ltd.
(Cayman Islands)                                                 Coastal States Management Corporation                      100
Coastal do Brasil Ltda. (Brazil)                                 Coastal States Management Corporation                  99.9999
                                                                 El Paso Merchant Energy-Petroleum Company                .0001
Coastal Technology Guatemala, Ltda.                              Coastal States Trading Holdings Ltd.                        50
(Guatemala LLC)                                                  Coastal States Trading Investments Ltd.                     50
Coastal Energy of Panama, Inc. (Panama)                          Coastal Stock Company Limited                              100
Coastal Europe Limited (England)                                 Coastal Stock Company Limited                              100
Coastal Petroleum N.V. (Aruba)                                   Coastal Stock Company Limited                              100
Coastal Securities Company Limited (Bermuda)                     Coastal Stock Company Limited                              100
El Paso Petroleum Overseas N.V. (Aruba)                          Coastal Stock Company Limited                              100
Subic Bay Petroleum Products Ltd. (Cayman Islands)               Coastal Stock Company Limited                              100
Coastal Gusu Heat & Power Ltd. (Cayman Islands)                  Coastal Suzhou Investor Ltd.                                99
                                                                 Coastal Suzhou Manager Ltd.                                  1
Coastal Suzhou Power Ltd. (Cayman Islands)                       Coastal Suzhou Investor Ltd.                                99
                                                                 Coastal Suzhou Manager Ltd.                                  1
Suzhou Coastal Cogeneration Power Co., Ltd. (China)              Coastal Suzhou Power Ltd.                                   60
                                                                 Unaffiliated Parties                                        40
Suzhou New District Cogeneration Company (China)                 Coastal Suzhou Power Ltd.                                   60
                                                                 Unaffiliated Parties                                        40
</TABLE>

                                     Page 4
<PAGE>

<TABLE>
<CAPTION>
                                                                                                                              %
                         ENTITY NAME                                                  OWNER                               OWNERSHIP
----------------------------------------------------------------- -----------------------------------------------------------------
<S>                                                              <C>                                                      <C>
Palembang Coastal Technology (Singapore) Pte Ltd. (Singapore)    Coastal Technology Palembang (Cayman) Ltd.                   100
Pacific Refining Company (CA)                                    Coastal West Ventures, Inc.                       (LP)        99
                                                                 El Paso Merchant Energy-Petroleum Company         (GP)         1
Coastal Wuxi New District Ltd. (Cayman Islands)                  Coastal Wuxi Manager Ltd.                                      1
                                                                 Coastal Wuxi Investor Ltd.                                    99
Coastal Wuxi Power Ltd. (Cayman Islands)                         Coastal Wuxi Manager Ltd.                                     99
                                                                 Coastal Wuxi Investor Ltd.                                     1
Wuxi Huada Gas Turbine Electric Power Company (China)            Coastal Wuxi Power Ltd.                                       60
                                                                 Unaffiliated Parties                                          40
CIG Field Services Company (DE)                                  Colorado Interstate Gas Company                              100
Colorado Water Supply Company (DE)                               Colorado Interstate Gas Company                              100
Cliffside Refiners, LP                                           Colorado Water Supply Company                               3.96
                                                                 Cliffside Helium LLC                                           1
                                                                 Unaffiliated Parties                                       95.04
Coastal Canada Gas Inc. (New Brunswick)                          Cosbel Petroleum Corporation                                 100
Coastal Canada Petroleum, Inc. (New Brunswick)                   Cosbel Petroleum Corporation                                 100
Coastal Fuels of Puerto Rico, Inc. (DE)                          Cosbel Petroleum Corporation                                 100
Coastal Offshore Fuels, Inc. (Liberia)                           Cosbel Petroleum Corporation                                 100
Coastal Oil New England, Inc. (MA)                               Cosbel Petroleum Corporation                                 100
Coastal Oil New York, Inc. (DE)                                  Cosbel Petroleum Corporation                                 100
Coastal Petrochemical, Inc. (Quebec)                             Cosbel Petroleum Corporation                                  51
                                                                 Unaffiliated Parties                                          49
Coastal CFC Ltd. (Cayman Islands)                                Coscol Petroleum Corporation                                 100
Coastal India Petroleum Ltd. (Cayman Islands)                    Coscol Petroleum Corporation                                 100
Coastal LPG Dominicana Ltd. (Cayman Islands)                     Coscol Petroleum Corporation                                 100
Coastal Petrochemical International A.V.V. (Aruba)               Coscol Petroleum Corporation                                 100
Coastal Petroleum (Estonia) Ltd. (Cayman Islands)                Coscol Petroleum Corporation                                 100
Coastal Romanian Petroleum International A.V.V. (Aruba)          Coscol Petroleum Corporation                                 100
Coastal Romanian Petroleum SRL (Romania)                         Coscol Petroleum Corporation                                 100
Coastal Stock Company Limited (Bermuda)                          Coscol Petroleum Corporation                               57.37
                                                                 Coastal Austral Ltd.                                         .81
                                                                 Coastal Petrochemical International (L) Limited            19.22
                                                                 EPED B                                                     16.34
                                                                 EnCap Holdings (Denmark) ApS                                5.98
                                                                 El Paso Merchant Energy-Petroleum Company                    .28
Coscol Holding Company Ltd. (Cayman Islands)                     Coscol Petroleum Corporation                                 100
Coscol Investments Ltd. (Cayman Islands)                         Coscol Petroleum Corporation                                 100
Coscol Securities Ltd. (Cayman Islands)                          Coscol Petroleum Corporation                                 100
El Paso SLOC Holding Company (Cayman Islands)                    Coscol Petroleum Corporation                                 100
El Paso Tankships USA Company (DE)                               Coscol Petroleum Corporation                                 100
Coastal Subic Bay Terminal, Inc. (Philippines)                   Coscol Petroleum Corporation                                 100
Rensselaer Plant Holdco, L.L.C. (DE)                             El Paso Merchant Energy-Petroleum Company                    100
ANR Pipeline Company (DE)                                        El Paso ANR Investments, L.L.C.                              100
ANR Storage Company (MI)                                         El Paso ANRS Investments, L.L.C.                             100
Coastal BAS-97 Ltda. (Brazil)                                    El Paso Brazil, L.L.C.                                   99.8002
                                                                 El Paso Brazil Holdings Company                            .1998
El Paso Brazil Holdings Company (Cayman Islands)                 El Paso Brazil, L.L.C.                                       100
</TABLE>

                                     Page 5
<PAGE>

<TABLE>
<CAPTION>
                                                                                                                             %
                    ENTITY NAME                                                          OWNER                           OWNERSHIP
----------------------------------------------------------------------------------------------------------------------------------
<S>                                                              <C>                                                     <C>
El Paso Oleo e Gas do Brasil Ltda. (Brazil)                      El Paso Brazil, L.L.C.                                   99.8002
                                                                 El Paso Brazil Holdings Company                            .1998
El Paso Brazil, L.L.C. (DE)                                      El Paso Cayman BPAR-10 Company                             40.21
                                                                 El Paso Cayman BM-S-13 Company                             12.96
                                                                 El Paso Cayman BS-1 Company                                10.69
                                                                 El Paso Cayman BM-CAL-4 Company                            10.05
                                                                 Small percentages owned by 11 other El Paso entities       26.09
ANR Development Corporation (DE)                                 El Paso CGP Company                                          100
ANR Transportation Services Company (DE)                         El Paso CGP Company                                          100
ANRV-EP, Inc. (DE)                                               El Paso CGP Company                                          100
CIG Merchant Company (DE)                                        El Paso CGP Company                                          100
CIGE Holdco, Inc. (DE)                                           El Paso CGP Company                                          100
Coastal Bangchak Power Ltd. (Cayman Islands)                     El Paso CGP Company                                          100
Coastal Canada Gas Services, Inc. (New Brunswick)                El Paso CGP Company                                          100
Coastal Cape Horn Ltd. (Cayman Islands)                          El Paso CGP Company                                          100
Coastal Chem, Inc. (DE)                                          El Paso CGP Company                                          100
Coastal Clark Investor Ltd. (Cayman Islands)                     El Paso CGP Company                                          100
Coastal Clark Manager Ltd. (Cayman Islands)                      El Paso CGP Company                                          100
Coastal Eagle Point Oil Company (DE)                             El Paso CGP Company                                           51
                                                                 ANR Venture Eagle Point Company                               49
Coastal Finance I (DE)                                           El Paso CGP Company                                          100
Coastal Gas India Holdings Ltd. (Cayman Islands)                 El Paso CGP Company                                          100
Coastal Gas International Ltd. (Cayman Islands)                  El Paso CGP Company                                          100
Coastal Gas Storage Victoria Ltd. (Cayman Islands)               El Paso CGP Company                                          100
Coastal Halcon Pipeline I Ltd. (Cayman Islands)                  El Paso CGP Company                                          100
Coastal Halcon Pipeline II Ltd. (Cayman Islands)                 El Paso CGP Company                                          100
Coastal Henan Power Ltd. (Cayman Islands)                        El Paso CGP Company                                          100
Coastal Manager Ltd. (Cayman Islands)                            El Paso CGP Company                                          100
Coastal Mexicana Northeast Ltd. (Cayman Islands)                 El Paso CGP Company                                          100
Coastal Mexicana Northwest Ltd. (Cayman Islands)                 El Paso CGP Company                                          100
Coastal Mobile Refining Company (DE)                             El Paso CGP Company                                          100
Coastal Nanjing Investor Ltd. (Cayman Islands)                   El Paso CGP Company                                          100
Coastal Palembang Power Ltd. (Cayman Islands)                    El Paso CGP Company                                          100
Coastal Peenya Investor Ltd. (Cayman Islands)                    El Paso CGP Company                                          100
Coastal Peenya Manager Ltd. (Cayman Islands)                     El Paso CGP Company                                          100
Coastal Power Central America Ltd. (Cayman Islands)              El Paso CGP Company                                          100
Coastal Power Dominicana Generation Ltd.                         El Paso CGP Company                                        2.072
(Cayman Islands)                                                 Coastal Power Guatemala Ltd.                              97.928
Coastal Power Guatemala Distribution Ltd.                        El Paso CGP Company                                          100
(Cayman Islands)
Coastal Power Guatemala Ltd. (Cayman Islands)                    El Paso CGP Company                                          100
Coastal Power India (Cayman) Ltd. (Cayman Islands)               El Paso CGP Company                                          100
Coastal Power International II Ltd. (Cayman Islands)             El Paso CGP Company                                          100
Coastal Power International III Ltd. (Cayman Islands)            El Paso CGP Company                                          100
Coastal Power International IV Ltd. (Cayman Islands)             El Paso CGP Company                                          100
Coastal Power International Ltd. (Cayman Islands)                El Paso CGP Company                                          100
Coastal Power International V Ltd. (Cayman Islands)              El Paso CGP Company                                          100
Coastal Power Lanka Ltd. (Cayman Islands)                        El Paso CGP Company                                          100
Coastal Power Nicaragua Ltd. (Cayman Islands)                    El Paso CGP Company                                          100
Coastal Power Noapara Ltd. (Cayman Islands)                      El Paso CGP Company                                          100
</TABLE>

                                     Page 6
<PAGE>

<TABLE>
<CAPTION>
                                                                                                                          %
                      ENTITY NAME                                                 OWNER                              OWNERSHIP
------------------------------------------------------------------------------------------------------------------------------
<S>                                                              <C>                                                 <C>
Coastal Power Panama Generation Ltd.                             El Paso CGP Company                                    100
(Cayman Islands)
Coastal Rajgarh Investor Ltd. (Cayman Islands)                   El Paso CGP Company                                    100
Coastal Saba Investor Ltd. (Cayman Islands)                      El Paso CGP Company                                    100
Coastal Saba Manager Ltd. (Cayman Islands)                       El Paso CGP Company                                    100
Coastal States Energy Company (DE)                               El Paso CGP Company                                    100
Coastal States Management Corporation (CO)                       El Paso CGP Company                                    100
Coastal Suzhou Investor Ltd. (Cayman Islands)                    El Paso CGP Company                                    100
Coastal Suzhou Manager Ltd. (Cayman Islands)                     El Paso CGP Company                                    100
Coastal Unilube, Inc. (TN)                                       El Paso CGP Company                                    100
Coastal West Ventures, Inc. (DE)                                 El Paso CGP Company                                    100
Coastal Wuxi Investor Ltd. (Cayman Islands)                      El Paso CGP Company                                    100
Coastal Wuxi Manager Ltd. (Cayman Islands)                       El Paso CGP Company                                    100
Cosbel Petroleum Corporation (DE)                                El Paso CGP Company                                    100
Coscol Petroleum Corporation (DE)                                El Paso CGP Company                                    100
El Paso ANRS Investments, L.L.C. (DE)                            El Paso CGP Company                                    100
El Paso Bastrop GP Company (DE)                                  El Paso CGP Company                                    100
El Paso CNG Company, L.L.C. (DE)                                 El Paso CGP Company                                    100
El Paso Coal Holding, L.L.C. (DE)                                El Paso CGP Company                                   52.3
                                                                 American Natural Resources Company                    47.7
El Paso Energy Bastrop LP, Inc. (DE)                             El Paso CGP Company                                    100
El Paso Energy Capital Company (DE)                              El Paso CGP Company                                    100
El Paso Field Operations Company (DE)                            El Paso CGP Company                                    100
El Paso Merchant Energy-Petroleum Company (DE)                   El Paso CGP Company                                    100
El Paso Midland, Inc. (DE)                                       El Paso CGP Company                                    100
El Paso Power Khulna Holding Ltd. (Cayman Islands)               El Paso CGP Company                                    100
El Paso Production Oil & Gas Company (DE)                        El Paso CGP Company                                    100
El Paso Southern Pipeline Company (DE)                           El Paso CGP Company                                    100
El Paso Technology, Inc. (DE)                                    El Paso CGP Company                                    100
Thermal Power Salvador Ltd. (Cayman Islands)                     El Paso CGP Company                                    100
Starr Zapata Pipe Line (General Partnership) (TX)                El Paso CGP Gas Transmission Company                    50
                                                                 Unaffiliated Parties                                    50
American Natural Resources Company (DE)                          El Paso CNG Company, L.L.C.                            100
ANR Western Coal Development Company (DE)                        El Paso CNG Company, L.L.C.                            100
Cheyenne Plains Investment Company, L.L.C. (DE)                  El Paso CNG Company, L.L.C.                            100
CIG Gas Storage Company (DE)                                     El Paso CNG Company, L.L.C.                            100
CIG Resources Company (DE)                                       El Paso CNG Company, L.L.C.                            100
CIG-Canyon Compression Company (DE)                              El Paso CNG Company, L.L.C.                            100
Coastal International Finance Ltd. (Cayman Islands)              El Paso CNG Company, L.L.C.                            100
El Paso Noric Investments III, L.L.C. (DE)                       El Paso CNG Company, L.L.C.                            100
El Paso WIC Investments, L.L.C. (DE)                             El Paso CNG Company, L.L.C.                            100
Coastal Coal, Inc. (DE)                                          El Paso Coal Holding, L.L.C.                           100
Mobile Bay Processing Partners (DE)                              El Paso Dauphin Island Company, L.L.C.               42.39
                                                                 Unaffiliated Parties                                 57.61
El Paso Midwest Company (DE)                                     El Paso Energy Capital Company                         100
CFS Louisiana Midstream Company (DE)                             El Paso Field Operations Company                       100
El Paso CGP Gas Transmission Company (DE)                        El Paso Field Operations Company                       100
El Paso Gas Gathering & Processing Company (DE)                  El Paso Field Operations Company                       100
El Paso Gas Liquids Marketing, L.L.C. (DE)                       El Paso Field Operations Company                       100
Javelina Company (General Partnership) (TX)                      El Paso Field Operations Company                        40
</TABLE>

                                     Page 7
<PAGE>

<TABLE>
<CAPTION>
                                                                                                                             %
                       ENTITY NAME                                                  OWNER                                 OWNERSHIP
-----------------------------------------------------------------------------------------------------------------------------------
<S>                                                              <C>                                                      <C>
                                                                 Unaffiliated Parties                                          60
Javelina Pipeline Company (General Partnership) (TX)             El Paso Field Operations Company                              40
                                                                 Unaffiliated Parties                                          60
El Paso Dauphin Island Company, L.L.C. (DE)                      El Paso Gas Gathering & Processing Company                  99.9
                                                                 El Paso Field Operations Company                              .1
Great Lakes Gas Transmission Company (DE)                        El Paso Great Lakes, Inc.                                     50
                                                                 Unaffiliated Parties                                          50
Great Lakes Gas Transmission Limited Partnership (DE)            El Paso Great Lakes, Inc.                                  45.69
                                                                 Great Lakes Gas Transmission Company                        8.62
                                                                 Unaffiliated Parties                                       45.69
Khulna Power Company Ltd. (Bangladesh)                           El Paso Khulna Power ApS                                    73.9
                                                                 Unaffiliated Parties                                        26.1
Coastal (Rotterdam) B.V. (Netherlands)                           El Paso Merchant Energy-Petroleum Company                    100
Coastal Bridger Lake Pipeline Corporation (DE)                   El Paso Merchant Energy-Petroleum Company                    100
Coastal Pipeline Company (DE)                                    El Paso Merchant Energy-Petroleum Company                    100
Coastal States Trading Holdings Ltd. (Cayman Islands)            El Paso Merchant Energy-Petroleum Company                    100
Coastal States Trading Investments Ltd.                          El Paso Merchant Energy-Petroleum Company                    100
(Cayman Islands)
Distribuidora Coastal, S.A. de C.V. (El Salvador)                El Paso Merchant Energy-Petroleum Company                     99
                                                                 Coastal States Management Corporation                          1
Wasatch Wax L.L.C. (DE)                                          El Paso Merchant Energy-Petroleum Company                  33.33
                                                                 Unaffiliated Parties                                       66.66
Coastal Liquids Partners, L.P. (DE)                              El Paso Merchant Energy-Petroleum Company        (GP)       .804
                                                                 El Paso Merchant Energy-Petroleum Company        (LP)     97.002
                                                                 El Paso Production Oil & Gas Company             (LP)      2.194
Fulton Cogeneration Associates, L.P. (NY)                        El Paso Merchant Energy-Petroleum Company        (GP)          3
                                                                 El Paso Merchant Energy-Petroleum Company        (LP)      64.66
                                                                 Rensselaer Plant Holdco, L.L.C.                  (LP)      32.33
El Paso Micogen Partner, Inc. (DE)                               El Paso Midland, Inc.                                        100
Midland Cogeneration Venture Expansion, LLC (DE)                 El Paso Midland, Inc.                                         50
                                                                 Unaffiliated Parties                                          50
Midland Cogeneration Venture Limited Partnership (MI)            El Paso Midland, Inc.                                     10.875
                                                                 MEI Limited Partnership                                    4.985
                                                                 El Paso Micogen Partner, Inc.                               .045
                                                                 Micogen Limited Partnership                                4.486
                                                                 Source Midland Limited Partnership                         8.125
                                                                 Alanna Corporation                                        .00001
                                                                 Unaffiliated Parties                                      61.484
Source Midland Limited Partnership (DE)                          El Paso Midland, Inc.                            (LP)         80
                                                                 El Paso Micogen Partner, Inc.                    (GP)         20
MEI Limited Partnership (DE)                                     El Paso Midland, Inc.                            (LP)         49
                                                                 El Paso Midland, Inc.                            (GP)          1
                                                                 Source Midland Limited Partnership               (LP)         49
                                                                 Source Midland Limited Partnership               (GP)          1
Micogen Limited Partnership (DE)                                 El Paso Midland, Inc.                            (LP)         99
                                                                 El Paso Micogen Partner, Inc.                    (GP)          1
ANR Advance Holdings, Inc. (DE)                                  El Paso Midwest Company                                       50
                                                                 Unaffiliated Parties                                          50
Colorado Interstate Gas Company (DE)                             El Paso Noric Investments III, L.L.C.                        100
El Paso Khulna Power ApS (Denmark)                               El Paso Power Khulna Holding Ltd.                            100
</TABLE>

                                     Page 8
<PAGE>

<TABLE>
<CAPTION>
                                                                                                                            %
                         ENTITY NAME                                                     OWNER                           OWNERSHIP
----------------------------------------------------------------------------------------------------------------------------------
<C>                                                              <C>                                                     <C>
3082263 Nova Scotia Limited                                      El Paso Production Oil & Gas Company                        100
Coastal Australia AC 96-3 Ltd. (Cayman Islands)                  El Paso Production Oil & Gas Company                        100
Coastal Australia AC 96-4 Ltd. (Cayman Islands)                  El Paso Production Oil & Gas Company                        100
Coastal Development II Ltd. (Cayman Islands)                     El Paso Production Oil & Gas Company                        100
Coastal Development III Ltd. (Cayman Islands)                    El Paso Production Oil & Gas Company                        100
Coastal Indonesia Bangko Ltd. (Indonesia)                        El Paso Production Oil & Gas Company                        100
Coastal Oil & Gas Camisea Ltd. (Cayman Islands)                  El Paso Production Oil & Gas Company                        100
El Paso E & P International (Cayman Islands)                     El Paso Production Oil & Gas Company                        100
El Paso Energy Oil Transmission, L.L.C. (DE)                     El Paso Production Oil & Gas Company                        100
El Paso Hungary Ltd. (Hungary)                                   El Paso Production Oil & Gas Company                    99.8002
                                                                 El Paso Production Oil & Gas USA, L.P.                    .1998
El Paso Oil & Gas Nova Scotia I, ULC (Nova Scotia)               El Paso Production Oil & Gas Company                        100
El Paso Preferred Holdings Company (DE)                          El Paso Production Oil & Gas Company                        100
El Paso Production Oil & Gas Holdings, Inc. (DE)                 El Paso Production Oil & Gas Company                        100
El Paso Production Oil and Gas Processing Canada, Inc. (New      El Paso Production Oil & Gas Company                        100
Brunswick)
El Paso Production Resale Company (DE)                           El Paso Production Oil & Gas Company                        100
El Paso Production Oil & Gas Gathering, L.P. (DE)                El Paso Production Oil & Gas Company             (GP)         1
                                                                 El Paso Production Oil & Gas Holdings, Inc.      (LP)        99
El Paso Production Oil & Gas USA, L.P. (DE)                      El Paso Production Oil & Gas Company             (GP)         1
                                                                 El Paso Production Oil & Gas Holdings, Inc.      (LP)        99
El Paso Cayman BAS-97 Company (Cayman Islands)                   El Paso Production Oil & Gas Company (Ordinary Stock)        50
                                                                 El Paso Preferred Holding Company (Preferred Stock)          50
El Paso Cayman BCAM-2 Company (Cayman Islands)                   El Paso Production Oil & Gas Company (Ordinary Stock)        50
                                                                 El Paso Preferred Holding Company (Preferred Stock)          50
El Paso Cayman BM-CAL-4 Company                                  El Paso Production Oil & Gas Company (Ordinary Stock)        50
(Cayman Islands)                                                 El Paso Preferred Holding Company (Preferred Stock)          50
El Paso Cayman BM-CAL-5 Company (Cayman Islands)                 El Paso Production Oil & Gas Company (Ordinary Stock)        50
                                                                 El Paso Preferred Holding Company (Preferred Stock)          50
El Paso Cayman BM-CAL-6 Company (Cayman Islands)                 El Paso Production Oil & Gas Company (Ordinary Stock)        50
                                                                 El Paso Preferred Holding Company (Preferred Stock)          50
El Paso Cayman BM-ES-5 Company (Cayman Islands)                  El Paso Production Oil & Gas Company (Ordinary Stock)        50
                                                                 El Paso Preferred Holding Company (Preferred Stock)          50
El Paso Cayman BM-ES-6 Company (Cayman Islands)                  El Paso Production Oil & Gas Company (Ordinary Stock)        50
                                                                 El Paso Preferred Holding Company (Preferred Stock)          50
El Paso Cayman BM-PAMA-1 Company                                 El Paso Production Oil & Gas Company (Ordinary Stock)        50
(Cayman Islands)                                                 El Paso Preferred Holding Company (Preferred Stock)          50
El Paso Cayman BM-POT-11 Company                                 El Paso Production Oil & Gas Company (Ordinary Stock)        50
(Cayman Islands)                                                 El Paso Preferred Holding Company (Preferred Stock)          50
El Paso Cayman BM-POT-13 Company                                 El Paso Production Oil & Gas Company (Ordinary Stock)        50
(Cayman Islands)                                                 El Paso Preferred Holding Company (Preferred Stock)          50
El Paso Cayman BM-S-13 Company (Cayman Islands)                  El Paso Production Oil & Gas Company (Ordinary Stock)        50
                                                                 El Paso Preferred Holding Company (Preferred Stock)          50
El Paso Cayman BPAR-10 Company (Cayman Islands)                  El Paso Production Oil & Gas Company (Ordinary Stock)        50
                                                                 El Paso Preferred Holding Company (Preferred Stock)          50
El Paso Cayman Brazil Ventures Company                           El Paso Production Oil & Gas Company (Ordinary Stock)        50
(Cayman Islands)                                                 El Paso Preferred Holding Company (Preferred Stock)          50
El Paso Cayman BS-1 Company (Cayman Islands)                     El Paso Production Oil & Gas Company (Ordinary Stock)        50
                                                                 El Paso Preferred Holding Company (Preferred Stock)          50
El Paso Cayman BT-PR-4 Company (Cayman Islands)                  El Paso Production Oil & Gas Company (Ordinary Stock)        50
                                                                 El Paso Preferred Holding Company (Preferred Stock)          50
</TABLE>

                                     Page 9
<PAGE>

<TABLE>
<CAPTION>
                                                                                                                            %
                         ENTITY NAME                                                   OWNER                            OWNERSHIP
---------------------------------------------------------------------------------------------------------------------------------
<S>                                                              <C>                                                    <C>
El Paso Tankships Malta, Ltd. (Malta)                            El Paso SLOC Holding Company                               99
                                                                 Coscol Holding Company Ltd.                                 1
Energy Maritime Holdings LLC (DE)                                El Paso Tankships USA Company                              50
                                                                 Unaffiliated Parties                                       50
Coastal Technology Dominicana S.A.                               El Paso Technology, Inc.                                  100*
(Dominican Republic)
Coastal Technology Ltd. (Cayman Islands)                         El Paso Technology, Inc.                                  100
Coastal Technology Nicaragua S.A. (Nicaragua)                    El Paso Technology, Inc.                                  100
Coastal Technology Palembang (Cayman) Ltd.                       El Paso Technology, Inc.                                  100
(Cayman Islands)
El Paso Technology El Salvador, S.A. de C.V.                     El Paso Technology, Inc.                                   99
(El Salvador)                                                    El Paso Energy Service Company                              1
El Paso Technology Pakistan (Pvt.) Ltd. (Pakistan)               El Paso Technology, Inc.                                  100
CIG Gas Supply Company (DE)                                      El Paso WIC Investments, L.L.C.                           100
Wyoming Gas Supply Inc. (DE)                                     El Paso WIC Investments, L.L.C.                           100
Energy Maritime LLC (DE)                                         Energy Maritime Holdings LLC                              100
GLGT, Inc. (DE)                                                  Great Lakes Gas Transmission Company                      100
GLGT Aviation Company (DE)                                       Great Lakes Gas Transmission Limited Partnership          100
Western Fuel Oil Company (CA)                                    Pacific Refining Company (General Partnership)            100
Habibullah Coastal Power Company (Private) Limited (Pakistan)    Quetta Power Holding Company I Ltd.                        99
                                                                 Quetta Power Holding Company II Ltd.                        1
Quetta Power Holding Company II Ltd.                             Quetta Power Holding Company I Ltd.                        98
(Cayman Islands)                                                 Coastal Power International II Ltd.                         1
                                                                 Unaffiliated Parties                                        1
Coastal Salvadoran Power Ltd. (Cayman Islands)                   Thermal Power Salvador Ltd.                               100
El Salvador Distribution Holding Company Ltd. (Cayman Islands)   Thermal Power Salvador Ltd.                               100
Coastal Petroleum Argentina, S.A. (Argentina)                    Coastal Petroleum N.V.                                     98
                                                                 Triunion Energy Company                                     2
Wyoming Interstate Company Ltd. (CO)                             Wyoming Gas Supply Inc.                     (LP)           50
                                                                 CIG Gas Supply Company                      (GP)           50
</TABLE>

                                    Page 10